PM2.5 is a trending term in China, at least in big cities like Beijing, Shanghai and Chengdu. Even the old lady living my next door knows it – and check it everyday before she goes out to shop for fresh stocks.
The air quality standard was made popular since the US embassy started to post it on their weibo accounts (China mirco blog). The account of US embassy Beijing has over 656,000 followers.
There’re dozens of apps in China made for air quality reports. Recently BestApp, an app design and production agency in Guangzhou launched an opensource project PM25.in that collects PM2.5 data from 496 monitoring spots in 74 cities, which is renewed every hour.
Those data are publicly available online from various province bureaus. BestApp collects and organize the data and share it via API.